How to Use FB in PLC Programming

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With any controller or computing device, being able to define a function once and reuse the function over and over is a great way to make your program more efficient and robust.

In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB. The function block is executed each time it is called from an OB.

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How to Use FB in PLC Programming

With any controller or computing device, being able to define a function once and reuse the function over and over is a great way to make your program more efficient and robust.

In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB. The function block is executed each time it is called from an OB.

14 Videos

  • 1. What is an FB

    5m 31s · Streamable only + subs available in English

  • 2. How To Create FB in TIA Portal

    7m 36s · Streamable only + subs available in English

  • 3. How to configure the logic for the FB

    9m 11s · Streamable only + subs available in English

  • 4. Calling the FB from the OB and Defining the Data Block

    11m · Streamable only + subs available in English

  • 5. Practical Example of Using an FB (Valve Control) - Part 1

    9m 27s · Streamable only + subs available in English

  • 6. Practical Example of using an FB (Valve Control) - Part 2

    10m · Streamable only + subs available in English

  • 7. Practical Example of using an FB (Valve Control) - Part 3

    10m · Streamable only + subs available in English

  • 8. Practical Example of using an FB (Sequencer) - Part 1

    7m 27s · Streamable only + subs available in English

  • 9. Practical Example of using an FB (Sequencer) - Part 2

    10m · Streamable only + subs available in English

  • 10. Practical Example of using an FB (Sequencer) - Part 3

    10m · Streamable only + subs available in English

  • 11. Practical Example of using an FB (Sequencer) - Part 4

    7m 35s · Streamable only + subs available in English

  • 12. Practical Example of using an FB (Sequencer) - Part 5

    5m 41s · Streamable only + subs available in English

  • 13. Practical Example of using an FB (Sequencer) - Part 6

    11m · Streamable only + subs available in English

  • 14. Practical Example of using an FB (Sequencer) - Part 7

    11m · Streamable only + subs available in English

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You'll receive the following videos

  1. 1. What is an FB

    5m 31s · Streamable only

    With any controller or computing device, being able to define a function once and reuse the function over and over is a great way to make your program more efficient and robust.

    In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB. The function block is executed each time it is called from an OB.

    In this video, we will learn;
    ...

    Subs available in English
  2. 2. How To Create FB in TIA Portal

    7m 36s · Streamable only

    With any controller or computing device, being able to define a function once and reuse the function over and over is a great way to make your program more efficient and robust.

    In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB. The function block is executed each time it is called from an OB.

    In this video, we will learn:
    ...

    Subs available in English
  3. 3. How to configure the logic for the FB

    9m 11s · Streamable only

    In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB.

    The function block is executed each time it is called from an OB.

    In this video, we will learn:
    – how to configure the logic for the FB.

    Subs available in English
  4. 4. Calling the FB from the OB and Defining the Data Block

    11m · Streamable only

    In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB. The function block is executed each time it is called from an OB.

    In the previous videos in this series, we learned how to create and configure the logic for an FB in the STEP7 programming environment.

    In this video, you will learn:
    – How to configure the DB to support th...

    Subs available in English
  5. 5. Practical Example of Using an FB (Valve Control) - Part 1

    9m 27s · Streamable only

    In the previous videos in this series, we learned how to create and configure the logic for an FB in the STEP7 programming environment.

    In this video, we will learn how an FB can be used in a practical way through creating the logic for an on/off valve with a command disagree alarm.

    In the next video in this series, I will configure the logic to call the FB from the Main OB block.

    Subs available in English
  6. 6. Practical Example of using an FB (Valve Control) - Part 2

    10m · Streamable only

    In the previous video in this series, we created an FB in the STEP7 programming environment to open and close an on/off valve with 2 position feedback sensors.

    We also configured an alarm to indicate a command disagree alarm that is generated if the valve has not reached the commanded position in a set amount of time.

    In this video, you will learn how to create the logic in the Main OB1 for an on/off valve with a command disagree alarm.

    Subs available in English
  7. 7. Practical Example of using an FB (Valve Control) - Part 3

    10m · Streamable only

    In the previous video in this series, we learned how to create the logic in the Main OB1 to call an FB to control an on/off valve with a command disagree alarm.

    In this video, I will configure the Data Block, or DB, for the Function Block, compile the OB and simulate the operation of the valve.

    Subs available in English
  8. 8. Practical Example of using an FB (Sequencer) - Part 1

    7m 27s · Streamable only

    In the previous videos in the series “How to Use Function Blocks (or FB) in a PLC Program”, I showed you how to configure an FB and its associated Data Block, or DB, and how to call the FB from the main program.

    In this video, you will learn:

    – What a drum sequencer is, and,
    – How it can be used to adjust several outputs based on the state of the process.

    Subs available in English
  9. 9. Practical Example of using an FB (Sequencer) - Part 2

    10m · Streamable only

    In this series, we have seen that a Function Block has many practical real-world automation applications.

    I showed you how an FB and its associated data block are configured.

    In this video, I will show you how to configure a single block in the step seven programming environment to perform the function of a sequencer, and how I can use an FB to control the execution of the sequencer logic

    Subs available in English
  10. 10. Practical Example of using an FB (Sequencer) - Part 3

    10m · Streamable only

    In this video, I will show you how to configure additional input and output parameters in the DRUM sequencer block in the Sequencer FB, and how to configure the DRUM sequencer block to execute the recipe for the batch process.

    Subs available in English
  11. 11. Practical Example of using an FB (Sequencer) - Part 4

    7m 35s · Streamable only

    In this series, we have seen that a Function Block has many practical real-world automation applications.

    Today, we will continue to develop the example of the small batch process with a large mixing tank with an agitator, four-ingredient addition lines, and a bottom valve.

    Subs available in English
  12. 12. Practical Example of using an FB (Sequencer) - Part 5

    5m 41s · Streamable only

    In this video, we will configure the transition logic for Step 2.

    I will use the same construction as for the previous rung, but I will change the “compare equal” instruction to compare the step number to two. I have added the “BATCH_START” bit to a “SET OUTPUT” coil as before.

    The PIN chart indicates that Step 2 should transition to Step 3 when the total amount of water added is equal to or greater than 1000 liters.

    Instead of the bit t...

    Subs available in English
  13. 13. Practical Example of using an FB (Sequencer) - Part 6

    11m · Streamable only

    In this series, we have seen that a Function Block has many practical real-world automation applications. Today, I will complete the example of the small batch process with a large mixing tank with an agitator, four-ingredient addition lines, and a bottom valve.

    In the previous video, I showed you how to configure the required logic in the MAIN OB to call the sequencer and how to configure the logic to allow the sequencer to transition from on...

    Subs available in English
  14. 14. Practical Example of using an FB (Sequencer) - Part 7

    11m · Streamable only

    In this series, we have seen that a Function Block has many practical real-world automation applications.

    Today, I will complete the example of the small batch process with a large mixing tank with an agitator, four-ingredient addition lines, and a bottom valve.

    In the previous video, I completed the PLC programming of our small batch process.
    I added the necessary control logic to the “Sequencer” Function Block and also “MAIN OB”, so that...

    Subs available in English